As a mechanical engineer working at the Ganz factory from 1894, he designed the three-phase motor and generator series. On his initiative, it began work on three-phase hauling for railways. Based on their design, the Valtellina line was electrified, which became Europe's first electrified main railway line. He is recognized for the 50-phase, electric railway supplied from the national grid system.

As member of the Party of Socialist Communist Workers in Hungary, Kilián György went to the Soviet Union, after being released from prison in 1939, and when he parachuted down as partisan on Poland, he was killed in action during 1943.